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User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
201
4.8.4 Protocol VLAN
The network devices required to support multiple protocols cannot be easily grouped into a common VLAN. This may require
non-standard devices to pass traffic between different VLANs in order to encompass all the devices participating in a specific
protocol. This kind of configuration deprives users of the basic benefits of VLANs, including security and easy accessibility.
To avoid these problems, you can configure this Managed Switch with protocol-based VLANs that divide the physical network
into logical VLAN groups for each required protocol. When a frame is received at a port, its VLAN membership can then be
determined based on the protocol type being used by the inbound packets.
Command Usage
To configure protocol-based VLANs, follow these steps:
1. First configure VLAN groups for the protocols you want to use. Although not mandatory, we suggest configuring a
separate VLAN for each major protocol running on your network. Do not add port members at this time.
2. Create a protocol group for each of the protocols you want to assign to a VLAN using the Protocol VLAN Configuration
page.
3. Then map the protocol for each interface to the appropriate VLAN using the Protocol VLAN Port Configuration page.
The following limitations apply to the use of Protocol VLANs:
A maximum of 20 Protocol VLAN groups can be configured on the Managed Switch.
One Protocol VLAN group can be configured for each of the predefined protocols of IP, IPX, and Apple-talk
(Special Protocol field).
Up to 17 Protocol VLAN groups can be created where both the frame type and protocol are user defined
(Programmable Protocol) -please verify. Protocol VLAN groups created with the predefined protocols match all
frame-types.
Up to 5 Protocol VLAN groups can be concurrently mapped per port. One Protocol VLAN group for each of the
predefined protocols can be mapped to a port, while a maximum of two groups based on user defined frame and
protocol settings can be mapped per port. More than two user defined protocol groups cannot be mapped to a port,
even if no predefined protocol groups are mapped to the port.